[texworks] Problem with TW viewer : asymptote and layers

[site4000 at free.fr]

Hello,

I use Windows Seven 64 bits, TL2010 up to date with TLContrib and run 
TeXworks 0.4.0 (r.759).

I got the following Asymptote code here : 
http://asymptote.sourceforge.net/gallery/spectrum.asy

Here it is :

import graph;
usepackage("ocg");
settings.tex="pdflatex";

// Dan Bruton algorithm
pen nm2rgb(real wl, real gamma=0.8, bool intensity=true) {
   triple rgb;
   if(wl>= 380&&  wl<= 440) {rgb=((440-wl)/60,0,1);}
   if(wl>   440&&  wl<= 490) {rgb=(0,(wl-440)/50,1);}
   if(wl>   490&&  wl<= 510) {rgb=(0,1,(510-wl)/20);}
   if(wl>   510&&  wl<= 580) {rgb=((wl-510)/70,1,0);}
   if(wl>   580&&  wl<= 645) {rgb=(1,(645-wl)/65,0);}
   if(wl>   645&&  wl<= 780) {rgb=(1,0,0);}

   real Intensity=1;
   if(intensity) {
     if(wl>= 700) {Intensity=0.3+0.7*(780-wl)/80;}
     else if(wl<= 420) {Intensity=0.3+0.7*(wl-380)/40;}
   }

   return rgb((Intensity*rgb.x)**gamma,(Intensity*rgb.y)**gamma,
              (Intensity*rgb.z)**gamma);
}

real width=1;
real height=50;

begin("spectrum");
for(real i=380 ; i<= 780 ; i += width) {
   draw((i,0)--(i,height),width+nm2rgb(wl=i,false)+squarecap);
}
begin("Extinction",false); // nested
for(real i=380 ; i<= 780 ; i += width) {
   draw((i,0)--(i,height),width+nm2rgb(wl=i,true)+squarecap);
}
end();
end();

begin("Wavelength");
xaxis(scale(0.5)*"$\lambda$(nm)",BottomTop,380,780,
       RightTicks(scale(0.5)*rotate(90)*Label(),step=2,Step=10),above=true);
end();

// From Astronomical Data Center(NASA)
// Neutral only
real[] Na={423.899, 424.208, 427.364, 427.679, 428.784, 429.101,
            432.14, 432.462, 434.149, 434.474, 439.003, 439.334, 441.989, 442.325,
            449.418, 449.766, 454.163, 454.519, 568.2633, 568.8204, 588.995,
            589.5924};
begin("Na absorption");
for(int i=0; i<  Na.length; ++i) {
   draw((Na[i],0)--(Na[i],height),0.1*width+squarecap);
}
end();

begin("Na emission");
for(int i=0; i<  Na.length; ++i) {
   draw((Na[i],0)--(Na[i],-height),0.1*width+nm2rgb(Na[i],false)+squarecap);
}
end();

// Neutral only
real[] Zn={388.334, 396.543, 411.321, 429.288, 429.833, 462.981,
            468.014, 472.215, 481.053 , 506.866, 506.958, 518.198, 530.865,
            531.024, 531.102, 577.21, 577.55, 577.711, 623.79, 623.917, 636.234,
            647.918, 692.832, 693.847, 694.32, 779.936};
begin("Zn absorption",false);
for(int i=0; i<  Zn.length; ++i) {
   draw((Zn[i],0)--(Zn[i],height),width+squarecap);
}
end();

begin("Zn emission",false);
for(int i=0; i<  Zn.length; ++i) {
   draw((Zn[i],0)--(Zn[i],-height),width+nm2rgb(Zn[i],false)+squarecap);
}
end();

shipout(bbox(2mm,Fill(white)));




(When you compile this code with asymptote, it produces a pdf file with 7 layers)

Then I tried to use the Asymptote code above in the latex following document :





\documentclass{article}

\usepackage[utf8]{inputenc}

\usepackage[T1]{fontenc}

\usepackage{asymptote}

%\usepackage{ocg}

\begin{document}

\begin{asy}

import graph;

usepackage("ocg");

settings.tex="pdflatex";

// Dan Bruton algorithm

pen nm2rgb(real wl, real gamma=0.8, bool intensity=true) {

triple rgb;

if(wl >= 380 && wl <= 440) {rgb=((440-wl)/60,0,1);}

if(wl > 440 && wl <= 490) {rgb=(0,(wl-440)/50,1);}

if(wl > 490 && wl <= 510) {rgb=(0,1,(510-wl)/20);}

if(wl > 510 && wl <= 580) {rgb=((wl-510)/70,1,0);}

if(wl > 580 && wl <= 645) {rgb=(1,(645-wl)/65,0);}

if(wl > 645 && wl <= 780) {rgb=(1,0,0);}

real Intensity=1;

if(intensity) {

if(wl >= 700) {Intensity=0.3+0.7*(780-wl)/80;}

else if(wl <= 420) {Intensity=0.3+0.7*(wl-380)/40;}

}

return rgb((Intensity*rgb.x)**gamma,(Intensity*rgb.y)**gamma,

(Intensity*rgb.z)**gamma);

}

real width=1;

real height=50;

begin("spectrum");

for(real i=380 ; i <= 780 ; i += width) {

draw((i,0)--(i,height),width+nm2rgb(wl=i,false)+squarecap);

}

begin("Extinction",false); // nested

for(real i=380 ; i <= 780 ; i += width) {

draw((i,0)--(i,height),width+nm2rgb(wl=i,true)+squarecap);

}

end();

end();

begin("Wavelength");

xaxis(scale(0.5)*"$\lambda$(nm)",BottomTop,380,780,

RightTicks(scale(0.5)*rotate(90)*Label(),step=2,Step=10),above=true);

end();

// From Astronomical Data Center(NASA)

// Neutral only

real[] Na={423.899, 424.208, 427.364, 427.679, 428.784, 429.101,

432.14, 432.462, 434.149, 434.474, 439.003, 439.334, 441.989, 442.325,

449.418, 449.766, 454.163, 454.519, 568.2633, 568.8204, 588.995,

589.5924};

begin("Na absorption");

for(int i=0; i < Na.length; ++i) {

draw((Na[i],0)--(Na[i],height),0.1*width+squarecap);

}

end();

begin("Na emission");

for(int i=0; i < Na.length; ++i) {

draw((Na[i],0)--(Na[i],-height),0.1*width+nm2rgb(Na[i],false)+squarecap);

}

end();

// Neutral only

real[] Zn={388.334, 396.543, 411.321, 429.288, 429.833, 462.981,

468.014, 472.215, 481.053 , 506.866, 506.958, 518.198, 530.865,

531.024, 531.102, 577.21, 577.55, 577.711, 623.79, 623.917, 636.234,

647.918, 692.832, 693.847, 694.32, 779.936};

begin("Zn absorption",false);

for(int i=0; i < Zn.length; ++i) {

draw((Zn[i],0)--(Zn[i],height),width+squarecap);

}

end();

begin("Zn emission",false);

for(int i=0; i < Zn.length; ++i) {

draw((Zn[i],0)--(Zn[i],-height),width+nm2rgb(Zn[i],false)+squarecap);

}

end();

shipout(bbox(2mm,Fill(white)));

\end{asy}

\end{document}



When I compile this code with pdflatex (pdflatex+asy+pdflatex), there's 
non problem (I fact there is a problem because there is no more layers 
but that another problem and it doesn't come from TeXworks) but if you 
uncomment the fifth line (%\usepackage{ocg})
and then compile again with pdflatex (pdflatex+asy+pdflatex), everything 
disappear. However, if you read the pdf with acrobat, there's no problem 
with it.


Arthur